Follow each step carefully.
Press the power button to turn off the appliance.
Find the washing temperature sensor, typically near the heating element.
Unplug the wiring harness from the temperature sensor.
Unscrew the sensor from its mounting and take it out.
Place the new temperature sensor in the same position and secure it with screws.
Plug the wiring harness back into the new temperature sensor.
Press the power button to turn the appliance back on.